1 #ifndef __ASM_SH_THREAD_INFO_H
2 #define __ASM_SH_THREAD_INFO_H
5 * Copyright (C) 2002 Niibe Yutaka
7 * The copyright of original i386 version is:
9 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
10 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
16 #include <asm/processor.h>
19 struct task_struct *task; /* main task structure */
20 struct exec_domain *exec_domain; /* execution domain */
21 unsigned long flags; /* low level flags */
23 int preempt_count; /* 0 => preemptable, <0 => BUG */
24 mm_segment_t addr_limit; /* thread address space */
25 struct restart_block restart_block;
26 __u8 supervisor_stack[0];
31 #define PREEMPT_ACTIVE 0x10000000
34 * macros/functions for gaining access to the thread information structure
37 #define INIT_THREAD_INFO(tsk) \
40 .exec_domain = &default_exec_domain, \
44 .addr_limit = KERNEL_DS, \
46 .fn = do_no_restart_syscall, \
50 #define init_thread_info (init_thread_union.thread_info)
51 #define init_stack (init_thread_union.stack)
53 #define THREAD_SIZE (2*PAGE_SIZE)
55 /* how to get the thread information struct from C */
56 static inline struct thread_info *current_thread_info(void)
58 struct thread_info *ti;
59 #ifdef CONFIG_CPU_HAS_SR_RB
60 __asm__("stc r7_bank, %0" : "=r" (ti));
62 unsigned long __dummy;
64 __asm__ __volatile__ (
67 : "=&r" (ti), "=r" (__dummy)
68 : "1" (~(THREAD_SIZE - 1))
75 /* thread information allocation */
76 #define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
77 #define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
79 #else /* !__ASSEMBLY__ */
81 /* how to get the thread information struct from ASM */
82 #define GET_THREAD_INFO(reg) \
88 * thread information flags
89 * - these are process state flags that various assembly files may need to access
90 * - pending work-to-be-done flags are in LSW
91 * - other flags in MSW
93 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
94 #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
95 #define TIF_SIGPENDING 2 /* signal pending */
96 #define TIF_NEED_RESCHED 3 /* rescheduling necessary */
97 #define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
98 #define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
99 #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
100 #define TIF_MEMDIE 18
102 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
103 #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
104 #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
105 #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
106 #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
107 #define _TIF_USEDFPU (1<<TIF_USEDFPU)
108 #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
110 #define _TIF_WORK_MASK 0x000000FE /* work to do on interrupt/exception return */
111 #define _TIF_ALLWORK_MASK 0x000000FF /* work to do on any return to u-space */
113 #endif /* __KERNEL__ */
115 #endif /* __ASM_SH_THREAD_INFO_H */